[spek-troh-foh-toh-i-lek-trik] /ˌspɛk troʊˌfoʊ toʊ ɪˈlɛk trɪk/ adjective, Physics. 1. pertaining to the relationship between the wavelength of the incident radiation and the number of electrons released by a photoelectric substance.

[spek-troh-foh-tom-i-ter] /ˌspɛk troʊ foʊˈtɒm ɪ tər/ noun 1. an instrument for making photometric comparisons between parts of spectra. spectrophotometer /ˌspɛktrəʊfəʊˈtɒmɪtə/ noun 1. an instrument for producing or recording a spectrum and measuring the photometric intensity of each wavelength present, esp such an instrument used for infrared, visible, and ultraviolet radiation See also spectrometer spectrophotometer spec·tro·pho·tom·e·ter […]

[spek-troh-foh-tom-i-ter] /ˌspɛk troʊ foʊˈtɒm ɪ tər/ noun 1. an instrument for making photometric comparisons between parts of spectra. spectrophotometer /ˌspɛktrəʊfəʊˈtɒmɪtə/ noun 1. an instrument for producing or recording a spectrum and measuring the photometric intensity of each wavelength present, esp such an instrument used for infrared, visible, and ultraviolet radiation See also spectrometer spectrophotometer spec·tro·pho·tom·e·ter […]

spectrophotometric analysis n. The determination of the structure or quantity of substances by measuring their capacity to absorb light of various wavelengths. Also called spectrophotometry.

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